The M31 U CAN series is a full line of industrial-grade distributed remote I/O slave modules based on the standard CANopen protocol. This series provides 3 models with targeted I/O configurations to match diverse industrial automation needs: mixed signal I/O, high-speed transistor output, and high-power relay output. All modules support stackable expansion, seamless integration with mainstream PLCs, and robust industrial-grade protection, making them ideal for factory automation, process control, and SCADA systems.
Model Comparison & Quick Selection
| Model | I/O Configuration | Output Type | Core Advantage & Scenario |
|---|---|---|---|
| M31-AFAX4440G-U-CAN | 4DI + 4AI + 4DO | Digital Output + High-precision Analog Input | Mixed signal acquisition; for scenarios requiring both digital control and analog sensor data collection |
| M31-AXAX8080G-U-CAN | 8DI + 8DO | PNP Transistor | High-speed switching; for high-frequency low-power industrial load control and logic signal conversion |
| M31-AXEX8080G-U-CAN | 8DI + 8DO | Electromagnetic Relay | High-power load compatibility; supports both AC and DC loads, for valves, contactors and motors control |
Core Common Features
- Standard CANopen Protocol: Fully compliant with CANopen specifications, seamlessly compatible with mainstream PLCs, configuration software and host control systems.
- Flexible Modular Expansion: Supports up to 16 stackable I/O modules (including the host), expanding to a maximum of 256 I/O channels without replacing the main controller, greatly reducing deployment costs.
- Industrial-Grade Reliability: Built to EMC Level 3 protection standards, with full electrical isolation between power supply, logic circuits and I/O interfaces. Built-in ESD, lightning surge, fast transient burst and reverse polarity protection.
- Easy Configuration & Deployment: Device parameters can be configured conveniently via the built-in Ethernet port; supports standard 35mm DIN rail mounting or screw mounting for quick integration into industrial cabinets.
- Wide Voltage Power Supply: Supports DC 9~36V wide range input, adapting to complex and unstable industrial field power environments.
Detailed Technical Specifications by Model
1. M31-AFAX4440G-U-CAN (4DI + 4AI + 4DO Mixed Type)
This mixed-signal I/O module integrates high-precision analog acquisition and digital input/output functions in one compact unit, suitable for comprehensive data acquisition and control scenarios with both sensor signals and switching devices.
| Model | M31-AFAX4440G-U-CAN |
| Communication Protocol | Standard CANopen |
| I/O Configuration | 4 Digital Inputs (DI) + 4 Analog Inputs (AI) + 4 Digital Outputs (DO) |
| Analog Input Specs | 16-bit resolution, differential input, accuracy ≤ 1‰ |
| Supply Voltage | DC 9～36V |
| Protection Level | Industrial EMC Level 3, ESD, Surge, Reverse Polarity Protection |
| Mounting Type | 35mm DIN Rail / Screw Mounting |
2. M31-AXAX8080G-U-CAN (8DI + 8DO PNP Transistor Type)
High-speed digital I/O module with PNP transistor outputs, designed for high-frequency switching scenarios, providing fast response speed and reliable low-power load control performance.
| Model | M31-AXAX8080G-U-CAN |
| Communication Protocol | Standard CANopen |
| I/O Configuration | 8 Digital Inputs (DI) + 8 Digital Outputs (DO, PNP Transistor) |
| Output Feature | High-speed switching, suitable for low-power industrial loads and logic level conversion |
| Supply Voltage | DC 9～36V |
| Isolation Standard | Full electrical isolation between power, logic and I/O circuits |
| Mounting Type | 35mm DIN Rail / Positioning Hole Mounting |
3. M31-AXEX8080G-U-CAN (8DI + 8DO Relay Type)
Robust I/O module with electromagnetic relay outputs, supporting both AC and DC high-power loads, with strong versatility and adaptability for diverse field equipment control scenarios.
| Model | M31-AXEX8080G-U-CAN |
| Communication Protocol | Standard CANopen |
| I/O Configuration | 8 Digital Inputs (DI) + 8 Digital Outputs (DO, Electromagnetic Relay) |
| Output Feature | Supports both AC and DC loads, high power capacity, ideal for valves, contactors, motors control |
| Supply Voltage | DC 9～36V |
| Protection Standards | EMC Level 3, ESD, Fast Transient Burst Protection |
| Mounting Type | 35mm DIN Rail Mounting, Industrial Compact Enclosure |
Typical Applications
- Factory Automation & PLC Distributed Networking
- Industrial Process Control & On-site Data Acquisition
- SCADA Systems & Remote Equipment Monitoring
- Smart Grid & Substation Automation Control
- Building Automation & HVAC Control Systems
- Warehouse Logistics & Machinery Equipment Automation
- Pump, Valve & Heavy Electrical Equipment Control
